Vacuum adiabatic body and refrigerator

ABSTRACT

A vacuum adiabatic body according to the present invention includes a supporting block which is fastened to an outer surface of any one plate placed outside the control space in a plate member which provides a wall of the vacuum adiabatic body. Accordingly, since the vacuum adiabatic bodies in a state of being not in contact with each other can be fastened to each other, various products corresponding to the needs of the consumer can be provided.

TECHNICAL FIELD

The present invention relates to a vacuum adiabatic body and arefrigerator.

BACKGROUND ART

A vacuum adiabatic body is a product for suppressing heat transfer byvacuuming the interior of a body thereof. The vacuum adiabatic body canreduce heat transfer by convection and conduction, and hence is appliedto heating apparatuses and refrigerating apparatuses. In a typicaladiabatic method applied to a refrigerator, although it is differentlyapplied in refrigeration and freezing, a foam urethane adiabatic wallhaving a thickness of about 30 cm or more is generally provided.However, the internal volume of the refrigerator is therefore reduced.

In order to increase the internal volume of a refrigerator, there is anattempt to apply a vacuum adiabatic body to the refrigerator.

First, Korean Patent No. 10-0343719 (Reference Document 1) of thepresent applicant has been disclosed. According to Reference Document 1,there is disclosed a method in which a vacuum adiabatic panel isprepared and then built in walls of a refrigerator, and the exterior ofthe vacuum adiabatic panel is finished with a separate molding asStyrofoam (polystyrene). According to the method, additional foaming isnot required, and the adiabatic performance of the refrigerator isimproved. However, fabrication cost is increased, and a fabricationmethod is complicated.

As another example, a technique of providing walls using a vacuumadiabatic material and additionally providing adiabatic walls using afoam filling material has been disclosed in Korean Patent PublicationNo. 10-2015-0012712 (Reference Document 2). According to ReferenceDocument 2, fabrication cost is increased, and a fabrication method iscomplicated.

As another example, there is an attempt to fabricate all walls of arefrigerator using a vacuum adiabatic body that is a single product. Forexample, a technique of providing an adiabatic structure of arefrigerator to be in a vacuum state has been disclosed in U.S. PatentLaid-Open Publication No. US2040226956A1 (Reference Document 3).However, it is difficult to obtain an adiabatic effect of a practicallevel by providing the walls of the refrigerator to be in a sufficientvacuum state. Specifically, it is difficult to prevent heat transfer ata contact portion between external and internal cases having differenttemperatures. Further, it is difficult to maintain a stable vacuumstate. Furthermore, it is difficult to prevent deformation of the casesdue to a sound pressure in the vacuum state. Due to these problems, thetechnique of Reference Document 3 is limited to cryogenic refrigeratingapparatuses, and is not applied to refrigerating apparatuses used ingeneral households.

As a further alternative, the applicant of the present invention hasapplied Korean Patent Application Publication No. 10-2017-0016187, avacuum adiabatic body and a refrigerator.

The present cited invention proposes to configure a single cooling spaceusing a single vacuum adiabatic body. However, in an actualrefrigerator, a plurality of storage chambers having differenttemperatures must be provided, but, in the related art, there is aproblem that it is not considered.

DISCLOSURE OF INVENTION Technical Problem

The present invention is proposed in the background described above andproposes a method of fastening each vacuum adiabatic body in a casewhere a plurality of storage chambers having different temperatures areprovided as a vacuum adiabatic body.

The present invention proposes a refrigerator in which the dispositionof parts including a vacuum adiabatic body providing a plurality ofstorage chambers is efficiently performed.

The present invention proposes a refrigerator in which a pipelineconnection of a vacuum adiabatic body providing a plurality of storagechambers is effectively performed.

Solution to Problem

The vacuum adiabatic body according to the present invention includes asupporting block which is fastened to an outer surface of any one plateplaced outside the plate member constituting an outer wall of the vacuumadiabatic body. Accordingly, it is possible to provide a refrigerationapparatus in which a plurality of products in which temperaturesdifferent from each other can be maintained, in particular, arefrigerating chamber and a freezing chamber are provided together,since a gap can be maintained between the vacuum adiabatic body and anexternal product, particularly, another vacuum adiabatic body.

The supporting block may be provided at a vertex of a flat surface ofany one plate. Accordingly, the support of the entire plate can bestably performed.

A division panel which is fastened across the flat surface of any oneplate may be included, and accordingly, a space formed by any one platemay be utilized for another purpose to be different from each other.

A refrigerator according to the present invention includes: a first mainbody which is provided as a first vacuum insulation body having a firstopening with respect to a first accommodation space of the product; afirst door which opens and closes the opening of the first main body; asecond main body which is provided as a second vacuum insulation bodyhaving a second opening with respect to a second accommodation space ofanother product; a second door which opens and closes an opening of thesecond main body; and a mullion which is provided at a gap part betweenthe first main body and the second main body. According to the presentinvention, a plurality of vacuum adiabatic bodies can be utilized fordifferent purposes, and the influence of each vacuum adiabatic body oneach other can be eliminated.

The mullion includes a supporting block which is fastened to thecorresponding outer surfaces of the first vacuum adiabatic body and thesecond vacuum adiabatic body; and a front panel which is provided on afront part of the mullion. Accordingly, it is possible to stably supportthe contact surface of the vacuum adiabatic bodies and to prevent theinflow of the external product into the gap part of the mullion.

The front panel is provided with a hinge fastening part to which thedoor hinge for supporting the rotation operation of the door isfastened. Accordingly, the sealing function of the vacuum adiabatic bodyis ensured and a stable operation can be obtained. For example, asufficient strength can be secured as compared with a case where thedoor is supported on the thin wall of the vacuum adiabatic body.

The supporting block may be provided at a vertex of any one of theopposed surfaces of the first vacuum adiabatic body and the secondvacuum adiabatic body. Accordingly, the contact and the gap securementbetween the two vacuum adiabatic bodies can be stably performed.

The supporting block and the front panel are fastened to each other by asingle member. The workability of the production site is improved.

A division panel which divides the inner space into at least two spacesacross the inner space of the mullion is further included. Accordingly,the inner space utilization of the mullion can be further improved.

A defrost water tray or a defrost water connection part is provided atany one place in the divided inner spaces. Accordingly, it is notnecessary to utilize a separate external space and defrost water-relatedstructure necessary for the operation can be provided so that the spaceinside the refrigerator can be utilized to be larger and the product canbe downsized.

A controller is placed in any one place in the divided inner spaces.Accordingly, the space utilization is further increased, so that thecontroller, which is generally fastened to the outer surface, can beturned into the refrigerator. Nevertheless, the controller can stay inthe space outside the refrigerator, so there is no problem in theoperational performance of the controller.

The mullion may be provided with a cold air flow path which communicatesthe first main body and the second main body with each other.Accordingly, a plurality of cooling spaces can be more easily providedusing a single refrigeration cycle.

A machine chamber which is positioned outside the vacuum adiabatic body;a first refrigerant pipe which extends from the machine chamber andextends along a vacuum space part within the wall body of at least oneof the first vacuum adiabatic body and the second vacuum adiabatic body;an evaporator which is provided in at least one of the first main bodyand the second main body; and a second refrigerant pipe which extendsfrom the evaporator and performs heat exchange inside the firstrefrigerant pipe and the vacuum space part can be further included.Accordingly, a single refrigeration system can realize a refrigeratorcapable of stable operation.

So as to provide a heat exchange pipeline of a refrigerator having amain body provided as a vacuum insulation body, a first flow path whichpasses the space inside the refrigerator, a second flow path whichpasses the space outside the refrigerator; and a third flow path whichis placed in a vacuum space part which is an inner space of the vacuuminsulation body so that the discharge flow path from the evaporator andthe discharge flow path from the machine chamber perform heat exchangewith each other can be provided. Accordingly, the vacuum space part canbe efficiently used, the large space inside the refrigerator can besecured, and the product can be compactly provided.

An evaporator which is placed in the space inside the refrigerator so asto draw out the defrost water generated in the refrigerator having themain body provided as a vacuum insulation body; and a drain pipe whichis installed through the vacuum space part, which is an inner space ofthe vacuum insulation body, so as to draw the defrost water generatedfrom the evaporator into the space outside the refrigerator areincluded. According to the present invention, it is possible to improvethe usability of the vacuum space part and to stably draw out thedefrost water.

A drain tray which is provided inside the mullion so that the defrostedwater drawn from the drain pipe can be collected. Accordingly, since thedefrost water can be removed from a narrow gap part, the product can bemade compact.

The refrigerator of the present invention is provided as a combinationof two or more vacuum adiabatic bodies and includes mullions provided ina gap part between the vacuum insulating bodies to integrate the two ormore vacuum adiabatic bodies. Accordingly, it is possible to provide arefrigerator in which the storage houses having high adiabaticefficiency are placed in mutually independent spaces to meet variousconsumer needs.

The controller can be placed in the mullion. Accordingly, it is possibleto contribute to the compactness of the product by increasing the spaceutilization of the mullion which is placed outside the refrigerator.

The defrost tray may be placed in the mullion. Accordingly, spaceutilization can be further increased.

Advantageous Effects of Invention

According to the present invention, vacuum adiabatic bodies stackedvertically can be tightly fastened, and a worker can conveniently carryout the work.

According to the present invention, by utilizing the vacuum space partof the vacuum adiabatic body and the non-adiabatic property of themullion, a large number of parts can be accommodated in the space, andaccordingly, the volume inside the refrigerator can be made larger.

According to the present invention, it is possible to optimally disposethe connection of the refrigeration of the vacuum adiabatic body/coldair/power supply/defrost water according to the specifications ofvarious refrigerators, thereby realizing a refrigeration cycle with themaximum efficiency.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a perspective view of a refrigerator according to anembodiment.

FIG. 2 is a view schematically showing a vacuum adiabatic body used in amain body and a door of the refrigerator.

FIG. 3 is a view showing various embodiments of an internalconfiguration of a vacuum space part.

FIG. 4 is a view showing various embodiments of conductive resistancesheets and peripheral parts thereof.

FIG. 5 illustrates graphs showing changes in adiabatic performance andchanges in gas conductivity with respect to vacuum pressures by applyinga simulation.

FIG. 6 illustrates graphs obtained by observing, over time and pressure,a process of exhausting the interior of the vacuum adiabatic body when asupporting unit is used.

FIG. 7 illustrates graphs obtained by comparing vacuum pressures and gasconductivities.

FIG. 8 is a rear perspective view illustrating a refrigerator in which avacuum adiabatic body is used.

FIG. 9 is an exploded perspective view illustrating by exploding amullion and a main body of a refrigerator according to an embodiment ofthe present invention.

FIG. 10 is a perspective view illustrating a state where the mullionsare stacked on the second main body.

FIG. 11 is a view for explaining an internal configuration of a mullionaccording to an embodiment.

FIG. 12 is a perspective view illustrating the front supporting block.

FIG. 13 is a perspective view of a rear supporting block.

FIGS. 14 to 18 are views illustrating another embodiment of a mullion.

FIGS. 19 to 24 are views schematically illustrating embodiments of arefrigerator using a separating vacuum adiabatic body.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, specific embodiments of the present invention are proposedwith reference to the drawings. However, there is no intention to limitthe idea of the invention to the embodiments described below, a personskilled in the art which understands the idea of the present inventioncan easily propose other embodiments included within the scope of thesame idea by adding, changing, and deleting constituent elements, or thelike, but it will be understood that other embodiments are also includedwithin the scope of the present invention.

Hereinafter, the drawings presented for the explanation of theembodiments may simply display parts which differ from the actualproducts, be exaggerated, simple, or detailed, however, this is tofacilitate the understanding of the technical idea of the presentinvention, and should not be construed as being limited to sizes,structures, and shapes illustrated in the drawings. However, preferably,the actual shape may be illustrated as much as possible.

In the following embodiments, unless the embodiments do not collide witheach other, the description of any one embodiment may be applied to thedescription of another embodiment, and some configurations of any oneembodiment may be applied to another configuration in a state where onlya specific portion thereof is modified.

In the following description, the term ‘vacuum pressure’ means a certainpressure state lower than atmospheric pressure. In addition, theexpression that a vacuum degree of A is higher than that of B means thata vacuum pressure of A is lower than that of B.

FIG. 1 is a perspective view of a refrigerator according to anembodiment.

Referring to FIG. 1, the refrigerator 1 includes a main body 2 providedwith a cavity 9 capable of storing storage goods and a door 3 providedto open/close the main body 2. The door 3 may be rotatably or movablydisposed to open/close the cavity 9. The cavity 9 may provide at leastone of a refrigerating chamber and a freezing chamber.

Parts constituting a freezing cycle in which cold air is supplied intothe cavity 9. Specifically, the parts include a compressor 4 forcompressing a refrigerant, a condenser 5 for condensing the compressedrefrigerant, an expander 6 for expanding the condensed refrigerant, andan evaporator 7 for evaporating the expanded refrigerant to take heat.As a typical structure, a fan may be installed at a position adjacent tothe evaporator 7, and a fluid blown from the fan may pass through theevaporator 7 and then be blown into the cavity 9. A freezing load iscontrolled by adjusting the blowing amount and blowing direction by thefan, adjusting the amount of a circulated refrigerant, or adjusting thecompression rate of the compressor, so that it is possible to control arefrigerating space or a freezing space.

FIG. 2 is a view schematically showing a vacuum adiabatic body used inthe main body and the door of the refrigerator. In FIG. 2, a mainbody-side vacuum adiabatic body is illustrated in a state in which topand side walls are removed, and a door-side vacuum adiabatic body isillustrated in a state in which a portion of a front wall is removed. Inaddition, sections of portions at conductive resistance sheets areprovided are schematically illustrated for convenience of understanding.

Referring to FIG. 2, the vacuum adiabatic body includes a first platemember 10 for providing a wall of a low-temperature space, a secondplate member 20 for providing a wall of a high-temperature space, avacuum space part 50 defined as a gap part between the first and secondplate members 10 and 20. Also, the vacuum adiabatic body includes theconductive resistance sheets 60 and 63 for preventing heat conductionbetween the first and second plate members 10 and 20. A sealing part 61for sealing the first and second plate members 10 and 20 is providedsuch that the vacuum space part 50 is in a sealing state. When thevacuum adiabatic body is applied to a refrigerating or heating cabinet,the first plate member 10 may be referred to as an inner case, and thesecond plate member 20 may be referred to as an outer case. A machinechamber 8 in which parts providing a freezing cycle are accommodated isplaced at a lower rear side of the main body-side vacuum adiabatic body,and an exhaust port 40 for forming a vacuum state by exhausting air inthe vacuum space part 50 is provided at any one side of the vacuumadiabatic body. In addition, a pipeline 64 passing through the vacuumspace part 50 may be further installed so as to install a defrostingwater line and electric lines.

The first plate member 10 may define at least one portion of a wall fora first space provided thereto. The second plate member 20 may define atleast one portion of a wall for a second space provided thereto. Thefirst space and the second space may be defined as spaces havingdifferent temperatures. Here, the wall for each space may serve as notonly a wall directly contacting the space but also a wall not contactingthe space. For example, the vacuum adiabatic body of the embodiment mayalso be applied to a product further having a separate wall contactingeach space.

Factors of heat transfer, which cause loss of the adiabatic effect ofthe vacuum adiabatic body, are heat conduction between the first andsecond plate members 10 and 20, heat radiation between the first andsecond plate members 10 and 20, and gas conduction of the vacuum spacepart 50.

Hereinafter, a heat resistance unit provided to reduce adiabatic lossrelated to the factors of the heat transfer will be provided. Meanwhile,the vacuum adiabatic body and the refrigerator of the embodiment do notexclude that another adiabatic means is further provided to at least oneside of the vacuum adiabatic body. Therefore, an adiabatic means usingfoaming or the like may be further provided to another side of thevacuum adiabatic body.

FIG. 3 is a view showing various embodiments of an internalconfiguration of the vacuum space part.

First, referring to FIG. 3a , the vacuum space part 50 is provided in athird space having a different pressure from the first and secondspaces, preferably, a vacuum state, thereby reducing adiabatic loss. Thethird space may be provided at a temperature between the temperature ofthe first space and the temperature of the second space. Since the thirdspace is provided as a space in the vacuum state, the first and secondplate members 10 and 20 receive a force contracting in a direction inwhich they approach each other due to a force corresponding to apressure difference between the first and second spaces. Therefore, thevacuum space part 50 may be deformed in a direction in which it isreduced. In this case, adiabatic loss may be caused due to an increasein amount of heat radiation, caused by the contraction of the vacuumspace part 50, and an increase in amount of heat conduction, caused bycontact between the plate members 10 and 20.

A supporting unit 30 may be provided to reduce the deformation of thevacuum space part 50. The supporting unit 30 includes bars 31. The bars31 may extend in a direction substantially vertical to the first andsecond plate members 10 and 20 so as to support a distance between thefirst and second plate members 10 and 20. A support plate 35 may beadditionally provided to at least one end of the bar 31. The supportplate 35 connects at least two bars 31 to each other, and may extend ina direction horizontal to the first and second plate members 10 and 20.The support plate 35 may be provided in a plate shape, or may beprovided in a lattice shape such that its area contacting the first orsecond plate member 10 or 20 is decreased, thereby reducing heattransfer. The bars 31 and the support plate 35 are fixed to each otherat least one portion, to be inserted together between the first andsecond plate members 10 and 20. The support plate 35 contacts at leastone of the first and second plate members 10 and 20, thereby preventingdeformation of the first and second plate members 10 and 20. Inaddition, based on the extending direction of the bars 31, a totalsectional area of the support plate 35 is provided to be greater thanthat of the bars 31, so that heat transferred through the bars 31 can bediffused through the support plate 35.

A material of the supporting unit 30 may include a resin selected fromthe group consisting of PC, glass fiber PC, low outgassing PC, PPS, andLCP so as to obtain high compressive strength, low outgassing and waterabsorptance, low thermal conductivity, high compressive strength at hightemperature, and excellent machinability.

A radiation resistance sheet 32 for reducing heat radiation between thefirst and second plate members 10 and 20 through the vacuum space part50 will be described. The first and second plate members 10 and 20 maybe made of a stainless material capable of preventing corrosion andproviding a sufficient strength. The stainless material has a relativelyhigh emissivity of 0.16, and hence a large amount of radiation heat maybe transferred. In addition, the supporting unit 30 made of the resinhas a lower emissivity than the plate members, and is not entirelyprovided to inner surfaces of the first and second plate members 10 and20. Hence, the supporting unit 30 does not have great influence onradiation heat. Therefore, the radiation resistance sheet 32 may beprovided in a plate shape over a majority of the area of the vacuumspace part 50 so as to concentrate on reduction of radiation heattransferred between the first and second plate members 10 and 20. Aproduct having a low emissivity may be preferably used as the materialof the radiation resistance sheet 32. In an embodiment, an aluminum foilhaving an emissivity of 0.02 may be used as the radiation resistancesheet 32. Since the transfer of radiation heat cannot be sufficientlyblocked using one radiation resistance sheet, at least two radiationresistance sheets 32 may be provided at a certain distance so as not tocontact each other. In addition, at least one radiation resistance sheetmay be provided in a state in which it contacts the inner surface of thefirst or second plate member 10 or 20.

Referring to FIG. 3b , the distance between the plate members ismaintained by the supporting unit 30, and a porous substance 33 may befilled in the vacuum space part 50. The porous substance 33 may have ahigher emissivity than the stainless material of the first and secondplate members 10 and 20. However, since the porous substance 33 isfilled in the vacuum space part 50, the porous substance 33 has a highefficiency for resisting the radiation heat transfer.

In this embodiment, the vacuum adiabatic body can be fabricated withoutusing the radiation resistance sheet 32.

Referring to FIG. 3c , the supporting unit 30 maintaining the vacuumspace part 50 is not provided. Instead of the supporting unit 30, theporous substance 33 is provided in a state in which it is surrounded bya film 34. In this case, the porous substance 33 may be provided in astate in which it is compressed so as to maintain the gap of the vacuumspace part 50. The film 34 is made of, for example, a PE material, andmay be provided in a state in which holes are formed therein.

In this embodiment, the vacuum adiabatic body can be fabricated withoutusing the supporting unit 30. In other words, the porous substance 33can simultaneously serve as the radiation resistance sheet 32 and thesupporting unit 30.

A case where the porous substance 33 is filled in the vacuum space part50 will be described in detail later.

FIG. 4 is a view showing various embodiments of the conductiveresistance sheets and peripheral parts thereof. Structures of theconductive resistance sheets are briefly illustrated in FIG. 2, but willbe understood in detail with reference to FIG. 4.

First, a conductive resistance sheet proposed in FIG. 4a may bepreferably applied to the main body-side vacuum adiabatic body.Specifically, the first and second plate members 10 and 20 are to besealed so as to vacuum the interior of the vacuum adiabatic body. Inthis case, since the two plate members have different temperatures fromeach other, heat transfer may occur between the two plate members. Aconductive resistance sheet 60 is provided to prevent heat conductionbetween two different kinds of plate members.

The conductive resistance sheet 60 may be provided with sealing parts 61at which both ends of the conductive resistance sheet 60 are sealed todefining at least one portion of the wall for the third space andmaintain the vacuum state. The conductive resistance sheet 60 may beprovided as a thin foil in unit of micrometer so as to reduce the amountof heat conducted along the wall for the third space. The sealing parts61 may be provided as welding parts. That is, the conductive resistancesheet 60 and the plate members 10 and 20 may be fused to each other. Inorder to cause a fusing action between the conductive resistance sheet60 and the plate members 10 and 20, the conductive resistance sheet 60and the plate members 10 and 20 may be made of the same material, and astainless material may be used as the material. The sealing parts 61 arenot limited to the welding parts, and may be provided through a processsuch as cocking. The conductive resistance sheet 60 may be provided in acurved shape. Thus, a heat conduction distance of the conductiveresistance sheet 60 is provided longer than the linear distance of eachplate member, so that the amount of heat conduction can be furtherreduced.

A change in temperature occurs along the conductive resistance sheet 60.Therefore, in order to block heat transfer to the exterior of theconductive resistance sheet 60, a shielding part 62 may be provided atthe exterior of the conductive resistance sheet 60 such that anadiabatic action occurs. In other words, in the refrigerator, the secondplate member 20 has a high temperature and the first plate member 10 hasa low temperature. In addition, heat conduction from high temperature tolow temperature occurs in the conductive resistance sheet 60, and hencethe temperature of the conductive resistance sheet 60 is suddenlychanged. Therefore, when the conductive resistance sheet 60 is opened tothe exterior thereof, heat transfer through the opened place mayseriously occur. In order to reduce heat loss, the shielding part 62 isprovided at the exterior of the conductive resistance sheet 60. Forexample, when the conductive resistance sheet 60 is exposed to any oneof the low-temperature space and the high-temperature space, theconductive resistance sheet 60 does not serve as a conductive resistoras well as the exposed portion thereof, which is not preferable.

The shielding part 62 may be provided as a porous substance contactingan outer surface of the conductive resistance sheet 60. The shieldingpart 62 may be provided as an adiabatic structure, e.g., a separategasket, which is placed at the exterior of the conductive resistancesheet 60. The shielding part 62 may be provided as a portion of thevacuum adiabatic body, which is provided at a position facing acorresponding conductive resistance sheet 60 when the main body-sidevacuum adiabatic body is closed with respect to the door-side vacuumadiabatic body. In order to reduce heat loss even when the main body andthe door are opened, the shielding part 62 may be preferably provided asa porous substance or a separate adiabatic structure.

A conductive resistance sheet proposed in FIG. 4b may be preferablyapplied to the door-side vacuum adiabatic body. In FIG. 4b , portionsdifferent from those of FIG. 4a are described in detail, and the samedescription is applied to portions identical to those of FIG. 4a . Aside frame 70 is further provided at an outside of the conductiveresistance sheet 60. A part for sealing between the door and the mainbody, an exhaust port necessary for an exhaust process, a getter portfor vacuum maintenance, and the like may be placed on the side frame 70.This is because the mounting of parts is convenient in the mainbody-side vacuum adiabatic body, but the mounting positions of parts arelimited in the door-side vacuum adiabatic body.

In the door-side vacuum adiabatic body, it is difficult to place theconductive resistance sheet 60 at a front end portion of the vacuumspace part, i.e., a corner side portion of the vacuum space part. Thisis because, unlike the main body, a corner edge portion of the door isexposed to the exterior. More specifically, if the conductive resistancesheet 60 is placed at the front end portion of the vacuum space part,the corner edge portion of the door is exposed to the exterior, andhence there is a disadvantage in that a separate adiabatic part shouldbe configured so as to heat-insulate the conductive resistance sheet 60.

A conductive resistance sheet proposed in FIG. 4c may be preferablyinstalled in the pipeline passing through the vacuum space part. In FIG.4c , portions different from those of FIGS. 4a and 4b are described indetail, and the same description is applied to portions identical tothose of FIGS. 4a and 4b . A conductive resistance sheet having the sameshape as that of FIG. 4a , preferably, a wrinkled conductive resistancesheet 63 may be provided at a peripheral portion of the pipeline 64.Accordingly, a heat transfer path can be lengthened, and deformationcaused by a pressure difference can be prevented. In addition, aseparate shielding part may be provided to improve the adiabaticperformance of the conductive resistance sheet.

A heat transfer path between the first and second plate members 10 and20 will be described with reference back to FIG. 4a . Heat passingthrough the vacuum adiabatic body may be divided into surface conductionheat {circle around (1)} conducted along a surface of the vacuumadiabatic body, more specifically, the conductive resistance sheet 60,supporter conduction heat {circle around (2)} conducted along thesupporting unit 30 provided inside the vacuum adiabatic body, gasconduction heat {circle around (3)} conducted through an internal gas inthe vacuum space part, and radiation transfer heat {circle around (4)}transferred through the vacuum space part.

The transfer heat may be changed depending on various depending onvarious design dimensions. For example, the supporting unit may bechanged such that the first and second plate members 10 and 20 canendure a vacuum pressure without being deformed, the vacuum pressure maybe changed, the distance between the plate members may be changed, andthe length of the conductive resistance sheet may be changed. Thetransfer heat may be changed depending on a difference in temperaturebetween the spaces (the first and second spaces) respectively providedby the plate members. In the embodiment, a preferred configuration ofthe vacuum adiabatic body has been found by considering that its totalheat transfer amount is smaller than that of a typical adiabaticstructure formed by foaming polyurethane. In a typical refrigeratorincluding the adiabatic structure formed by foaming the polyurethane, aneffective heat transfer coefficient may be proposed as 19.6 mW/mK.

By performing a relative analysis on heat transfer amounts of the vacuumadiabatic body of the embodiment, a heat transfer amount by the gasconduction heat {circle around (3)} can become smallest. For example,the heat transfer amount by the gas conduction heat {circle around (3)}may be controlled to be equal to or smaller than 4% of the total heattransfer amount. A heat transfer amount by solid conduction heat definedas a sum of the surface conduction heat {circle around (1)} and thesupporter conduction heat {circle around (2)} is largest. For example,the heat transfer amount by the solid conduction heat may reach 75% ofthe total heat transfer amount. A heat transfer amount by the radiationtransfer heat {circle around (4)} is smaller than the heat transferamount by the solid conduction heat but larger than the heat transferamount of the gas conduction heat {circle around (3)}. For example, theheat transfer amount by the radiation transfer heat {circle around (4)}may occupy about 20% of the total heat transfer amount.

According to such a heat transfer distribution, effective heat transfercoefficients (eK: effective K) (W/mK) of the surface conduction heat{circle around (1)}, the supporter conduction heat {circle around (2)},the gas conduction heat {circle around (3)}, and the radiation transferheat {circle around (4)} may have an order of Math FIG. 1.

eK _(solid conduction heat) >eK _(radiation transfer heat) >eK_(gas conduction heat)  Math FIG. 1

Here, the effective heat transfer coefficient (eK) is a value that canbe measured using a shape and temperature differences of a targetproduct. The effective heat transfer coefficient (eK) is a value thatcan be obtained by measuring a total heat transfer amount and atemperature at least one portion at which heat is transferred. Forexample, a calorific value (W) is measured using a heating source thatcan be quantitatively measured in the refrigerator, a temperaturedistribution (K) of the door is measured using heats respectivelytransferred through a main body and an edge of the door of therefrigerator, and a path through which heat is transferred is calculatedas a conversion value (m), thereby evaluating an effective heat transfercoefficient.

The effective heat transfer coefficient (eK) of the entire vacuumadiabatic body is a value given by k=QL/AΔT. Here, Q denotes a calorificvalue (W) and may be obtained using a calorific value of a heater. Adenotes a sectional area (m²) of the vacuum adiabatic body, L denotes athickness (m) of the vacuum adiabatic body, and ΔT denotes a temperaturedifference.

For the surface conduction heat, a conductive calorific value may beobtained through a temperature difference (ΔT) between an entrance andan exit of the conductive resistance sheet 60 or 63, a sectional area(A) of the conductive resistance sheet, a length (L) of the conductiveresistance sheet, and a thermal conductivity (k) of the conductiveresistance sheet (the thermal conductivity of the conductive resistancesheet is a material property of a material and can be obtained inadvance). For the supporter conduction heat, a conductive calorificvalue may be obtained through a temperature difference (ΔT) between anentrance and an exit of the supporting unit 30, a sectional area (A) ofthe supporting unit, a length (L) of the supporting unit, and a thermalconductivity (k) of the supporting unit. Here, the thermal conductivityof the supporting unit is a material property of a material and can beobtained in advance. The sum of the gas conduction heat {circle around(3)}, and the radiation transfer heat {circle around (4)} may beobtained by subtracting the surface conduction heat and the supporterconduction heat from the heat transfer amount of the entire vacuumadiabatic body. A ratio of the gas conduction heat {circle around (3)},and the radiation transfer heat {circle around (4)} may be obtained byevaluating radiation transfer heat when no gas conduction heat exists byremarkably lowering a vacuum degree of the vacuum space part 50.

When a porous substance is provided inside the vacuum space part 50,porous substance conduction heat {circle around (5)} may be a sum of thesupporter conduction heat {circle around (2)} and the radiation transferheat {circle around (4)}. The porous substance conduction heat {circlearound (5)} may be changed depending on various variables including akind, an amount, and the like of the porous substance.

According to an embodiment, a temperature difference ΔT₁ between ageometric center formed by adjacent bars 31 and a point at which each ofthe bars 31 is located may be preferably provided to be less than 0.5°C. Also, a temperature difference ΔT₂ between the geometric centerformed by the adjacent bars 31 and an edge portion of the vacuumadiabatic body may be preferably provided to be less than 0.5° C. In thesecond plate member 20, a temperature difference between an averagetemperature of the second plate and a temperature at a point at which aheat transfer path passing through the conductive resistance sheet 60 or63 meets the second plate may be largest. For example, when the secondspace is a region hotter than the first space, the temperature at thepoint at which the heat transfer path passing through the conductiveresistance sheet meets the second plate member becomes lowest.Similarly, when the second space is a region colder than the firstspace, the temperature at the point at which the heat transfer pathpassing through the conductive resistance sheet meets the second platemember becomes highest.

This means that the amount of heat transferred through other pointsexcept the surface conduction heat passing through the conductiveresistance sheet should be controlled, and the entire heat transferamount satisfying the vacuum adiabatic body can be achieved only whenthe surface conduction heat occupies the largest heat transfer amount.To this end, a temperature variation of the conductive resistance sheetmay be controlled to be larger than that of the plate member.

Physical characteristics of the parts constituting the vacuum adiabaticbody will be described. In the vacuum adiabatic body, a force by vacuumpressure is applied to all of the parts. Therefore, a material having astrength (N/m²) of a certain level may be preferably used.

Under such circumferences, the plate members 10 and 20 and the sideframe 70 may be preferably made of a material having a sufficientstrength with which they are not damaged by even vacuum pressure. Forexample, when the number of bars 31 is decreased so as to limit thesupport conduction heat, deformation of the plate member occurs due tothe vacuum pressure, which may bad influence on the external appearanceof refrigerator. The radiation resistance sheet 32 may be preferablymade of a material that has a low emissivity and can be easily subjectedto thin film processing. Also, the radiation resistance sheet 32 is toensure a strength enough not to be deformed by an external impact. Thesupporting unit 30 is provided with a strength enough to support theforce by the vacuum pressure and endure an external impact, and is tohave machinability. The conductive resistance sheet 60 may be preferablymade of a material that has a thin plate shape and can endure the vacuumpressure.

In an embodiment, the plate member, the side frame, and the conductiveresistance sheet may be made of stainless materials having the samestrength. The radiation resistance sheet may be made of aluminum havinga weaker strength that the stainless materials. The supporting unit maybe made of resin having a weaker strength than the aluminum.

Unlike the strength from the point of view of materials, analysis fromthe point of view of stiffness is required. The stiffness (N/m) is aproperty that would not be easily deformed. Although the same materialis used, its stiffness may be changed depending on its shape. Theconductive resistance sheets 60 or 63 may be made of a material having astrength, but the stiffness of the material is preferably low so as toincrease heat resistance and minimize radiation heat as the conductiveresistance sheet is uniformly spread without any roughness when thevacuum pressure is applied. The radiation resistance sheet 32 requires astiffness of a certain level so as not to contact another part due todeformation. Particularly, an edge portion of the radiation resistancesheet may generate conduction heat due to drooping caused by theself-load of the radiation resistance sheet. Therefore, a stiffness of acertain level is required. The supporting unit 30 requires a stiffnessenough to endure a compressive stress from the plate member and anexternal impact.

In an embodiment, the plate member and the side frame may preferablyhave the highest stiffness so as to prevent deformation caused by thevacuum pressure. The supporting unit, particularly, the bar maypreferably have the second highest stiffness. The radiation resistancesheet may preferably have a stiffness that is lower than that of thesupporting unit but higher than that of the conductive resistance sheet.The conductive resistance sheet may be preferably made of a materialthat is easily deformed by the vacuum pressure and has the loweststiffness.

Even when the porous substance 33 is filled in the vacuum space part 50,the conductive resistance sheet may preferably have the loweststiffness, and the plate member and the side frame may preferably havethe highest stiffness.

Hereinafter, a vacuum pressure preferably determined depending on aninternal state of the vacuum adiabatic body. As already described above,a vacuum pressure is to be maintained inside the vacuum adiabatic bodyso as to reduce heat transfer. At this time, it will be easily expectedthat the vacuum pressure is preferably maintained as low as possible soas to reduce the heat transfer.

The vacuum space part may resist the heat transfer by applying only thesupporting unit 30. Alternatively, the porous substance 33 may be filledtogether with the supporting unit in the vacuum space part 50 to resistthe heat transfer. Alternatively, the vacuum space part may resist theheat transfer not by applying the supporting unit but by applying theporous substance 33.

The case where only the supporting unit is applied will be described.

FIG. 5 illustrates graphs showing changes in adiabatic performance andchanges in gas conductivity with respect to vacuum pressures by applyinga simulation.

Referring to FIG. 5, it can be seen that, as the vacuum pressure isdecreased, i.e., as the vacuum degree is increased, a heat load in thecase of only the main body (Graph 1) or in the case where the main bodyand the door are joined together (Graph 2) is decreased as compared withthat in the case of the typical product formed by foaming polyurethane,thereby improving the adiabatic performance. However, it can be seenthat the degree of improvement of the adiabatic performance is graduallylowered. Also, it can be seen that, as the vacuum pressure is decreased,the gas conductivity (Graph 3) is decreased. However, it can be seenthat, although the vacuum pressure is decreased, the ratio at which theadiabatic performance and the gas conductivity are improved is graduallylowered. Therefore, it is preferable that the vacuum pressure isdecreased as low as possible. However, it takes long time to obtainexcessive vacuum pressure, and much cost is consumed due to excessiveuse of a getter. In the embodiment, an optimal vacuum pressure isproposed from the above-described point of view.

FIG. 6 illustrates graphs obtained by observing, over time and pressure,a process of exhausting the interior of the vacuum adiabatic body whenthe supporting unit is used.

Referring to FIG. 6, in order to create the vacuum space part 50 to bein the vacuum state, a gas in the vacuum space part 50 is exhausted by avacuum pump while evaporating a latent gas remaining in the parts of thevacuum space part 50 through baking. However, if the vacuum pressurereaches a certain level or more, there exists a point at which the levelof the vacuum pressure is not increased any more (Δt1). After that, thegetter is activated by disconnecting the vacuum space part 50 from thevacuum pump and applying heat to the vacuum space part 50 (Δt2). If thegetter is activated, the pressure in the vacuum space part 50 isdecreased for a certain period of time, but then normalized to maintaina vacuum pressure of a certain level. The vacuum pressure that maintainsthe certain level after the activation of the getter is approximately1.8×10⁻⁶ Torr.

In the embodiment, a point at which the vacuum pressure is notsubstantially decreased any more even though the gas is exhausted byoperating the vacuum pump is set to the lowest limit of the vacuumpressure used in the vacuum adiabatic body, thereby setting the minimuminternal pressure of the vacuum space part 50 to 1.8×10⁻⁶ Torr.

FIG. 7 illustrates graphs obtained by comparing vacuum pressures and gasconductivities.

Referring to FIG. 7, gas conductivities with respect to vacuum pressuresdepending on sizes of a gap in the vacuum space part 50 are representedas graphs of effective heat transfer coefficients (eK). Effective heattransfer coefficients (eK) were measured when the gap in the vacuumspace part 50 has three sizes of 2.76 mm, 6.5 mm, and 12.5 mm. The gapin the vacuum space part 50 is defined as follows. When the radiationresistance sheet 32 exists inside vacuum space part 50, the gap is adistance between the radiation resistance sheet 32 and the plate memberadjacent thereto. When the radiation resistance sheet 32 does not existinside vacuum space part 50, the gap is a distance between the first andsecond plate members.

It can be seen that, since the size of the gap is small at a pointcorresponding to a typical effective heat transfer coefficient of 0.0196W/mK, which is provided to a adiabatic material formed by foamingpolyurethane, the vacuum pressure is 2.65×10⁻¹ Torr even when the sizeof the gap is 2.76 mm. Meanwhile, it can be seen that the point at whichreduction in adiabatic effect caused by gas conduction heat is saturatedeven though the vacuum pressure is decreased is a point at which thevacuum pressure is approximately 4.5×10⁻³ Torr. The vacuum pressure of4.5×10⁻³ Torr can be defined as the point at which the reduction inadiabatic effect caused by gas conduction heat is saturated. Also, whenthe effective heat transfer coefficient is 0.1 W/mK, the vacuum pressureis 1.2×10² Torr.

When the vacuum space part 50 is not provided with the supporting unitbut provided with the porous substance, the size of the gap ranges froma few micrometers to a few hundreds of micrometers. In this case, theamount of radiation heat transfer is small due to the porous substanceeven when the vacuum pressure is relatively high, i.e., when the vacuumdegree is low. Therefore, an appropriate vacuum pump is used to adjustthe vacuum pressure. The vacuum pressure appropriate to thecorresponding vacuum pump is approximately 2.0×10⁻⁴ Torr. Also, thevacuum pressure at the point at which the reduction in adiabatic effectcaused by gas conduction heat is saturated is approximately 4.7×10²Torr. Also, the pressure where the reduction in adiabatic effect causedby gas conduction heat reaches the typical effective heat transfercoefficient of 0.0196 W/mK is 730 Torr.

In a case where the supporting unit and the porous material are providedtogether in the vacuum space part, an intermediate vacuum pressurebetween a case of using only the supporting unit and a case of usingonly the porous material may be created and used. In a case where onlythe porous material is used, the lowest vacuum pressure can be createdand used.

Hereinafter, a detailed configuration of a refrigerator to which thevacuum adiabatic body as described above is applied will be described.

In the refrigerator according to the present embodiment, two independentvacuum adiabatic bodies can be applied to a single refrigerator. Here,the independent vacuum adiabatic bodies may mean that the firstaccommodation space in which one vacuum adiabatic body is provided canbe provided differently from the second accommodation space in which theother vacuum adiabatic body is provided at temperatures in theaccommodation space. More specifically, a main body-side vacuumadiabatic body having an opening for allowing entry and exit of theproduct and an accommodation space for the product provides a singleaccommodation space, and the two main body-side vacuum adiabatic bodiesare coupled to each other to provide a single refrigerator.

FIG. 8 is a rear perspective view illustrating a refrigerator in which avacuum adiabatic body is used.

Referring to FIG. 8, the refrigerator according to the embodimentincludes a first main body 2 a which is provided as a first vacuumadiabatic body and has a first opening and a first accommodation space;a first door 3 a which is capable of opening and closing an opening ofthe first main body 2 a placed on the upper part; a second main body 2 bwhich is provided as a second vacuum adiabatic body and has a secondopening and a second accommodation space; a second door 3 b which iscapable of opening and closing an opening of the second main body 2 aplaced on the lower part; and a mullion 300 which is provided at aboundary part between the first main body 2 a and the second main body 2b. The doors 3 a and 3 b may or may not be provided as vacuum adiabaticbodies as in the main bodies 2 a and 2 b.

Since both the first main body and the second main body are provided asa vacuum adiabatic body, a plurality of members including a first platemember and the second plate member as described above may be applied tothe first main body. Similarly, the second main body may be providedwith a third plate member corresponding to the first plate member, and afourth plate member corresponding to the second plate member.

Except for structural differences or special differences between thefirst main body and the second main body, both can be provided in thesame configuration. The sealing portion may likewise have the firstsealing portion of the first main body and the second sealing portion ofthe second main body. In addition, the same is true for a large numberof parts such as a supporting unit, a thermal resistance unit, and aport.

The mullion 300 is a configuration which is provided outside the vacuumadiabatic body providing the main bodies 2 a and 2 b and is independentof the temperature control condition in which the main bodies 2 a and 2b are formed.

The main body 2 a and 2 b are stacked vertically and the mullion 300 canbe provided at the contact part of the main body 2 a and 2 b as separateproducts which are separated from the main bodies 2 a and 2 b. Theseparate products which are separated from the main bodies 2 a and 2 bmay mean the manufacturing process of the main body 2 a and 2 b providedas the vacuum adiabatic body and the manufacturing process of themullion 300 are independent of each other and the main bodies 2 a and 2b and the mullion 300 are manufactured as different products and thenassembled in the final process.

The machine chamber 8 is illustrated as being provided at the rear upperend part of the first main body 2 a, but is not limited thereto, and maybe provided at the rear lower end part of the second main body 2 b.

In this embodiment, the mullion 300 can perform the function offastening the vacuum adiabatic bodies providing the respective mainbodies 2 a and 2 b to each other, and the function of providing apredetermined gap in order that the main bodies 2 a and 2 b do notaffect each other.

Since the main bodies 2 a and 2 b are provided in a stacked structure,respectively, the first main body 2 a may be referred to as an uppermain body and the second main body 2 b may be referred to as a lowermain body. Therefore, for the convenience of explanation, the first mainbody 2 a may be referred to as an upper main body and the second mainbody 2 b may be referred to as a lower main body. However, the idea ofthe present invention may include not only the configuration in whichthe main body is divided into the upper and lower parts but also thevarious configurations such as the arrangement of the right and leftsides, the inclining arrangement, the mosaic arrangement, or the like.Likewise, three or more separate bodies, beyond two, may be provided ina state of being fastened to each other by the mullion. However, apreferred embodiment is provided such that the first main body of theupper and the second main body of the lower are fastened to each other.

FIG. 9 is an exploded perspective view illustrating a mullion and a mainbody of a refrigerator according to an embodiment of the presentinvention.

Referring to FIG. 9, a mullion 300 is provided at the boundary part ofthe main body 2 a and 2 b and the mullion 300 may include a supportingblock 310 and a panel member 350. The supporting block 310 may beprovided at each vertex portion of a two-dimensional flat surfaceconstituting a boundary part of the main bodies 2 a and 2 a.

The supporting block 310 is not limited to a hexahedron shape asillustrated but may be provided in various shapes such as a rib, asupporting plate, and a column. The height of the supporting block 310may provide a gap between the main bodies 2 a and 2 b so that the mainbodies 2 a and 2 b do not affect each other. The main bodies 2 a and 2 bcan be firmly fastened to each other by the supporting block 310. Thesupporting block 310 may not be provided on the entire outer surfaces ofthe main bodies 2 a and 2 b but may be fixed only at some point.

The panel member 350 may close the opening between the supporting blocks310. The panel member 350 may allow parts accommodated in the mullion300 to operate without external influences. The panel member 350 may beconfigured to fasten parts necessary for the operation of therefrigerator. The panel member 350 can divide the space of the mullion300.

FIG. 10 is a perspective view illustrating a state where the mullionsare stacked on the second main body, and a detailed configuration of themullion will be described with reference to FIG. 10.

Referring to FIG. 10, the supporting block 310 may include two frontsupporting blocks 311 and two rear supporting blocks 313, which areplaced forward and rearward based on the direction of the refrigerator.The panel member 350 includes a front panel 351 which is placed forwardbased on the direction of the refrigerator, a rear panel 353 which isplaced rearward based on the direction of the refrigerator, and a sidepanel 352 which is placed laterally based on the direction of therefrigerator. A division panel 354 which divides a space formed insidethe front panel 351, the rear panel 352, and the side panel 352. Abottom panel 355 may be provided on the bottom surface of the mullion300. The bottom panel 355 is a panel that divides the second main body 2b and the mullions 300 so that the action of the mullions 300 does notaffect the second main body 2 b. As a member similar to the bottom panel355, a top panel can be provided in a gap part between the first mainbody 2 a and the mullions 300, and the function thereof is the same asthe function of the bottom panel. In the following description, thedescription of the bottom panel 355 can be applied to the top panel aswell, unless otherwise indicated.

Each configuration of the mullion will be described in more detail.

The side panels 352 and the rear panel 353 may be formed so that theside and rear of the refrigerator are closed with respect to theoutside. The side panel 352 and the rear panel 353 may be fastened tothe supporting block 310.

The front panel 351 allows the front part of the mullion 300 to beshielded from the outside. The front panel 351 may be fastened to thesupporting block 310. At least one end part of the front panel 351 maybe provided with a hinge fastening part 3511. The hinge fastening part3511 can be fastened to the door hinge allowing the door 3 a or 3 b torotate. The door hinges may be provided corresponding to the doors 3 aand 3 b, respectively.

The hinge fastening part 3511 may be provided with a configuration suchas a groove, a boss, or a hole. The hinge fastening part 3551 caninteract with the front supporting block 311. For example, it ispossible to provide an action to be fastened to the boss 3117 (see FIG.12) of the front supporting block 311. The own weight of the doors 3 aand 3 b is supported not only by the front panel 351 but also by thefront supporting block 311 to prevent deformation due to the own weightthereof.

The thickness t1 of the front panel 351 may be thicker than thethickness t2 of the side panel 352 and the rear panel 353. Accordingly,the own weight of the door 3 can be firmly supported.

The front panel 351, the side panel 352, the bottom panel 355, and therear panel 353 are provided in a configuration capable of being openedor drawn out so that replacement, repair, and inspection of theconstituent elements placed in the mullion 300 can be performed. Thefront panel 351, the side panel 352, the bottom panel 355, and the rearpanel 353 may be replaced with the supporting block 310 and may performan action of supporting the own weight of the first main body 2 a, whichmay be insufficient in the supporting block 310.

The bottom panel 355 and the top panel may be provided with a connectionpipeline 360 communicating with the main body 2 a or 2 b or the interiorof the vacuum space part 50 of the vacuum adiabatic body providing themain body. The connection pipeline 360 may be provided with a weldedpipeline or a corrugated conductive resistance sheet 63 so as not toadversely affect the vacuum of the vacuum space part. The connectionpipeline 360 may be provided with a pipeline through which defrostwater, electric wires, cold air, and refrigerant pass. Anyone of theconnection pipelines 360 may provide pipelines through which one or morematerials pass. Here, the connection pipeline may be provided by athrough-hole provided in each plate member.

The division panel 354 can divide the inner space of the mullion 300 tobe capable of acting differently.

The spaces divided by the division panel 354 may have different physicalactions from each other. For example, the spaces may be maintained atdifferent temperature conditions or at different humidity conditions.

The division panel 354 not only functions to divide the inner space ofthe mullion but also functions to support the own weight of the firstmain body 2 a together with the front panel 351, the side panel 352, thebottom panel 355, and the rear panel 353.

In this case, the division panel 354 can perform a function of firmlysupporting the center of the lower surface part of the first main body 2a where the sag thereof may occur, so as to perform the action ofcrossing the inner space of the mullion 300. In other words, thestrength of the vacuum adiabatic body constituting the first main body 2a can be reinforced. The division panel 354 may be fastened to the firstmain body 2 a.

FIG. 11 is a view for explaining an internal configuration of a mullionaccording to an embodiment.

Referring to FIG. 11, the division panel 354 may divide the inner spaceof the mullion 300 into at least two spaces.

For example, any one of the divided spaces may provide the defrost watercollecting space, and the other of the divided spaces may provide thecontroller accommodation space. The defrost collecting space may includea drain tray 500 which receives and stores the defrost water introducedfrom the evaporator that communicates with the defrost collecting spaceand a drain heater 501 which evaporates the defrost water collected inthe drain tray 500. A controller 45 is provided in the controlleraccommodation space, and a plurality of electronic parts such as acontrol chip, a power chip, and the like necessary for controlling therefrigerator can be accommodated.

The defrost water collecting space and the controller accommodationspace have different characteristics of space. For example, the defrostwater collecting space may be provided as a space of high temperatureand high humidity, and the controller collecting space may be providedas a space of low temperature and low humidity. This is because heat isgenerated in the treatment of the defrost water to generate anenvironment of high humidity by the evaporated vapor, and the controlleris difficult to secure the reliability of the electronic part in a hightemperature and high humidity environment.

The division panel 354 allows one side and the other side thereof to beseparated as much as possible from each other with respect to heat ormoisture so that the two spaces do not affect each other. To this end, asealing member may further be provided at a contact portion with eachpanel, which is in contact with the division panel 354, so that at leasttwo spaces divided by the division panel 354 can be sealed.

The division of the space by the division panel 354 is not limited tothe above example, and various combinations of different use spaces canbe created. In a case where the mullion is provided not with theadiabatic space but with a space for accommodating the parts necessaryfor the operation of the refrigerator, the advantage of securing thespace inside the refrigerator can be expected by maximizing the space ofthe refrigerator.

FIG. 12 is a perspective view illustrating the front supporting block,and FIG. 13 is a perspective view illustrating the rear supportingblock. In the drawings, the lower left of the drawing may be the frontof the refrigerator.

Referring to FIG. 12, the front supporting block 311 is provided with afront upper surface part 3111 to which the lower surface of the firstmain body 2 a is fastened and a front lower surface part 3112 which isfastened to the upper surface of the second main body 2 b. The frontupper surface part 3111 and the front lower surface part 3112 arefastened to the corresponding surfaces of the main body 2 a and 2 b sothat the main body and the supporting block can be moved together.

The front upper fastening part 3115 and the front lower fastening part3116 are provided on the front upper surface part 3111 and the frontlower surface part 3112 so that the respective fastening parts canapproach and reach the main bodies 2 a and 2 b. As an example, a boss isprovided on the side of each of the main bodies 2 a and 2 b, and theboss is fitted in correspondence with the grooves of the front upperfastening part 3115 and the front lower fastening part 3116, and thefastening parts 3115 and 3116 can be fastened to the main body 2 a and 2b by fastening the separate fastening members to the bosses,respectively.

So as to maintain the gap between the front upper surface part 3111 andthe front lower surface part 3112, a front supporting part 3113 may beprovided. The front supporting part 3113 may be provided as a planarstructure for connecting each corner of the front upper surface part3111 and the front lower surface part 3112. The front supporting part313 may be provided on a surface facing the front side of therefrigerator among the front supporting blocks 311, and a boss 3117 maybe provided on the surface facing the front side thereof. The boss 3117may be applied to fastening the front panel 351. The boss 3117 canenhance the role of supporting the own weight of the door as describedabove.

The height of the front supporting part 3113 is the same as that of thefront panel 351 so that the setting of the fastening surface can beaccurately maintained.

One surface to which the front supporting part 3113 is not provided mayprovide a forward opening surface 3114. A worker can access from outsidethrough the front opening surface 3114. For example, the front upperfastening part 3115 and the front lower fastening part 3116 may befastened using a structure such as a bolt which reaches and is enteredthe front upper fastening part 3115 and the front lower fastening part3116. The same or similar fastening operation may be performed withrespect to the boss 3117 of the front supporting part 3113.

The front opening surface 3114 is preferably a side surface facing theouter surface of the refrigerator (right side facing surface withreference to the drawing) as illustrated in the drawing. This is becausethe worker can perform necessary tasks such as fastening and dismountingmore conveniently through the outer surface of the refrigerator.

The front supporting part 3113 is further provided to the rear and leftsides with reference to the drawing. The front supporting parts providedon the left and rear sides may not be provided. However, it is true thatit is desirable to provide so as to secure the sufficient strength ofthe front supporting block 311. In some cases, it is obvious that, in acase where sufficient strength can be ensured, the front supportingparts provided on the left and rear sides may not be provided.

Referring to FIG. 13, the rear supporting block 313 may perform asimilar operation in a configuration similar to that of the frontsupporting block 311. Therefore, the description of the front supportingblock 311 can be applied to a part thereof which is not specificallyexplained.

Specifically, a rear upper surface part 3131 fastened to the lowersurface of the first main body 2 a and a rear lower surface part 3132fastened to the upper surface of the second main body 2 b are provided.The front upper surface part 3111 and the front bottom surface part 3112may be provided with a front upper fastening part 3115 and a front lowerfastening part 3116, respectively.

A rear supporting part 3133 may be provided so as to maintain a gapbetween the rear upper surface part 3131 and the rear bottom surfacepart 3132. Unlike the front supporting part 3113, the rear supportingpart 3133 can be provided in the front and left sides and the otherportion can be opened. According to such a configuration, the worker canconveniently perform the fastening operation since the worker can selectany one surface among the right side surface and the rear surface, thatis, two surfaces, of the rear supporting block 313, which are exposed asthe outer surface of the refrigerator. The rear supporting block 313does not directly fasten to the door even in an aspect of supporting theown weight of the first main body 2 a so that it is possible to supportthe own weight even by the two rear supporting parts 3133.

FIGS. 14 to 18 are views illustrating another embodiment of the mullion.In the portions not specifically provided among the followingdescription, those already described will be applied.

Referring to FIG. 14, the present embodiment provides the frontsupporting block 311 and the rear supporting block 313 to provide a gapbetween the main bodies 2 a and 2 b. The present embodiment provides agap which provides a refrigerator having two spaces divided by thesupporting blocks 311 and 313.

A front panel 351 is provided in front of the pair of front supportingblocks 311. A relatively thick plate-like member may be applied to thefront panel 351 to fasten the door or the like. In addition to the frontpanel 351, left, right, and rear sides of the mullion 300 do not apply aseparate panel that shields the inside of the mullion or reinforces thestrength of the mullion. However, it is not excluded that a decorationplate made of a resin material is installed so as to cover not only themain bodies 2 a and 2 b but also the mullion portion after themanufacture of the refrigerator is completed. This description can beapplied equally in the following embodiments with respect to all thesurfaces on which no panel member is provided.

In this embodiment, the panel member is not provided in the otherportion except that the front panel is installed for fastening the door.According to the present embodiment, the cost can be minimized.

As is clear from this embodiment, the bottom panel 355 and the top panelmay be omitted by the second plate member 20 being applied. The bottompanel 355 and the top panel may not be provided separately in a casewhere the second plate member 20 has a predetermined thickness and asupporting strength with respect to the supporting block 310.

Referring to FIG. 15, the embodiment illustrated in FIG. 15 differs fromthe embodiment illustrated in FIG. 14 in that the rear panel 353 isfurther installed. The present embodiment makes it possible to protectthe rear surface part of the mullion for the purpose of reinforcing thestrength between the main bodies 2 a and 2 b and for the separatepurpose such as the characteristic protection of the rear surface partor the rear portion of the mullion.

The present embodiment has the effect of reinforcing the strength of themullion 300 and achieving shielding of the rear surface part, althoughthe cost for installing the rear panel may be additionally required.

Referring to FIG. 16, the embodiment illustrated in FIG. 16characteristically differs from the embodiment illustrated in FIG. 15 inthat the side panel 352 is further installed. The present embodimentmakes it possible to protect the side surface part of the mullion forthe purpose of reinforcing the strength between the main bodies 2 a and2 b or for the separate purpose such as the characteristic protection ofthe side surface part or the mullion side surface part.

Although the cost for installation of the side panels may beadditionally required in the present embodiment, it is effective toreinforce the strength of the mullions 300 and to achieve shielding ofthe side surface part.

Referring to FIG. 17, the front panel 351 and the side panel 352 areprovided to open without providing the rear panel 353 among the outerpanels of the mullion. The worker can carry out operations such asrepairing of trouble and taking out parts through the surface on whichthe rear panel 353 is not provided.

In a case of this embodiment, a division panel 354 may be furtherprovided to divide and accommodate parts inside the mullion 300 fromeach other. The inner space of the mullion can be divided by thedivision panel 354 to be different physical characteristics.

In this embodiment, the panel, particularly the division panel 354, cansupport the own weight of the first main body 2 b, particularly the ownweight of the middle portion thereof. Accordingly, it is possible toprevent the sag and deformation of the bottom surface of the first mainbody 2 b.

FIG. 18 differs from the embodiment illustrated in FIG. 11 in that atleast one of the division panel 354 and the bottom panel 355 is providedin a separate form which is separated from other panels.

In this embodiment, the bottom panel 355 can be applied to the upperouter surface of the second main body 2 b as a product separated fromother panel members and the supporting block. In this case, the bottompanel 355 is a product made of a resin material securing an adiabaticfunction, and the influence on the outer surface of the second main body2 b, particularly the second plate member 20 by the inner temperature ofthe mullion can be reduced. The description of the bottom panel 355 maybe similarly applied to the top panel, though not illustrated.

As described above, although the mullion is provided as an essentialfunction to perform an adiabatic function, it cannot reach the vacuuminside the third space. Therefore, even if a separate part is insertedinto the inside of the third space, the temperature inside the main bodymay not be affected by the adiabatic effect of the third space.

In another embodiment, a separable division wall 357 corresponding tothe division panel 354 may be provided at a position corresponding tothe division panel 354. The separable division wall 357 may be made ofresin, for example, different from other panels forming the mullion. Inthis case, it is possible to weaken the role of supporting the lowersurface of the first main body 2 a, but it is also possible to fit theseparable division wall 357 so as to enhance the reliability withrespect to the mutual separation of the divided inner spaces of themullion.

In this embodiment, a manufacturing process in which the supportingblock 310, the front panel 351, the rear panel 353, and the side panel352 are integrally provided can be introduced. The separable divisionwall 357 and the bottom panel 355 may be added when needed later or whenthe model of the product is changed. In this case, the same parts can beapplied to the product in a state where the separable division wall 357and the bottom panel 355 are not present, thereby reducing inventorycosts.

FIGS. 19 to 24 illustrate an embodiment of a refrigerator using aseparate vacuum adiabatic body. In the following description, a sideview of the refrigerator is illustrated and explained, and a vacuumadiabatic body is used as the main body unless otherwise specified. In acase where the leader line passes through the vacuum adiabatic body, itcan be understood that the pipeline and the part line pass through thevacuum adiabatic body. When penetrating the vacuum adiabatic body,members such as a welding pipeline and a corrugated conductiveresistance sheet 63 can be applied. The welding pipeline and thecorrugated conductive resistance sheet 63 can be subjected to a sealingaction. In a case where the leader line passes through the inside of thevacuum adiabatic body, it can be understood that the pipeline or partline passes inside the vacuum adiabatic body.

Referring to FIG. 19, as described above, the present embodiment is acase where a drain tray (also abbreviated as DT) 500, a drain heater(also abbreviated as DH) 501, and a controller 450 is placed in themullion 300.

For the convenience of explanation, the supply path of the power supply,the supply path of the refrigerant and the cold air, and the dischargepath of the defrost water are separately described.

First, the power supply path will be described. An external power sourcesupplied from the second space is supplied to the controller 450 insidethe mullion 300 placed in the second space. The controller 450 suppliesthe necessary power to the various parts 399 necessary for the operationof the refrigerator. The part 399 may include a lamp and a sensor and isplaced in the first space. In a case where the part 399 is a sensor, thecontroller 450 not only supplies power to the sensor but also receivesthe sensing signal of the sensor. It will be appreciated that the part399 also includes a compressor P constituting a refrigeration cycle.

The power may pass through the third space so as to supply power to thefirst space from the second space or may pass through a gap part betweenthe door and the main body.

The supply path of the coolant and cold air will be described.

First, cold air is explained. The cold air can be provided by theevaporators 81 and 82 placed in the inside of the main bodies 2 a and 2b, that is, in the first space, respectively, and be supplied to theinside of each of the main bodies 2 a and 2 b.

The refrigerant supply to the evaporators 81 and 82 will be described.The refrigerant can be provided to each evaporator which is placed inthe first space in a state before the evaporation, by the memberincluding the compressor P placed in the machine chamber 8 provided inthe second space. It is preferable for the pipelines of the inlet andoutlet of the evaporators 81 and 82 to perform heat exchange to eachother for improving the efficiency of the refrigeration cycle.Therefore, the refrigerant pipeline may have a flow path placed in thefirst space and a flow path placed in the second space, respectively.

Referring to FIG. 24, it can be seen that the two pipelines of the firstrefrigerant pipe 95 and the second refrigerant pipe 96 approach eachother and heat exchange occurs with each other. The first refrigerantpipe 95 may extend from the expander inside the machine chamber 8 andthe second refrigerant pipe 96 may be a pipeline extending from theevaporators 81 and 82. The heat exchange pipelines formed by the contactof the two refrigerant pipes are provided in a curved shape so as tosecure a sufficient heat exchange length in a narrow space, so the heatexchange pipelines can be called heat exchange curved pipes or S-pipes.

Referring again to FIG. 19, the S-pipe may be placed in the third spacewhich is an inner part of the wall body of each main body, that is, thevacuum adiabatic body. Therefore, it is possible to prevent heat loss,and there is no need for a space for insulating the pipeline separately.

This is explained using time series. The refrigerantcompressed/condensed/expanded in the machine chamber and directed to theevaporator 81 or 82 is bent by the heat exchange curved pipe inside thevacuum adiabatic body and supplied to the second evaporator (EVA. 2) 82.The refrigerant can be bent in the vacuum adiabatic body constitutingthe first main body 2 a by the heat change curved pipe and be suppliedto the first evaporator (Eva. 1) 81. The refrigerant supplied to each ofthe evaporators 81 and 82 can be branched and supplied, and the branchedpoint can be placed inside the machine chamber 8, that is, inside thevacuum insulation body.

The refrigerant evaporated in the evaporators 81 and 82 can perform heatexchange through the respective curved pipes.

The discharging path of the defrost water will be described.

The defrost water generated in the first evaporator 81 placed in thefirst space is collected in the drain tray (DT1) 500 positioned in themullion 300 which is placed in the second space through the third space,can be appropriately vaporized and removed by the drain heater (DH1)501. The defrost water generated in the second evaporator 81 placed inthe first space can be collected in the drain tray (DT2) 500 positionedin the interior of the machine chamber 8 placed in the second spacethrough the third space, and be appropriately vaporized and removed bythe drain heater (DH2) 502.

Here, a drain pipe (also referred to as DP) for connecting theevaporators 81 and 82 and the drain tray (DT1, DP2) 500 may be used topenetrate the third space. The defrost water can pass through the drainpipe. The drain (DP1) (DP2) may pass through the welding pipeline andcorrugated conductive resistance sheet 63. The drain pipe is illustratedas passing through the bottom surface of the vacuum adiabatic body inthe drawing, but may also be drawn out through the rear and sidesurfaces.

Although it is illustrated that the drain pipe passes through thewelding pipeline and corrugated conductive resistance sheet, the presentinvention is not limited thereto, and the drain pipe may be implementedby other methods, such as through pipes, drain pipe welding, andcylindrical sheets. The same is applied hereinafter.

Referring to FIG. 20, this embodiment characteristically differs fromthe embodiment illustrated in FIG. 19 only in the discharge path of thedefrost water. Therefore, the description of FIG. 19 is applied to otherdescription as it is, and only the discharging path of the defrost waterwill be described.

The defrost water generated in the first evaporator 81 may be guided tothe defrost water connection part 510 positioned inside the mullion 300.The defrost water connection part 510 is a portion where the defrostwater generated in the first main body 81 is guided primarily to theoutside of the first main body 81. The defrost water connection part 510may be provided as a drain tray (DT1) or a connection pipe (CP).

The defrost water generated in the second evaporator 81 is collected inthe drain tray DT2 500 positioned inside the machine chamber 8 and canbe appropriately vaporized and removed by the drain heater (DH2) 502.

The defrost water of the defrost water connection part 510 may becollected in the drain tray (DT2) 500 positioned inside the machinechamber 8 and appropriately vaporized and removed by the drain heater(DH2) 502. At this time, the pipeline connecting the defrost waterconnection part 510 and the drain tray (DT2) to each other may be guidedto the outside without passing through the wall body of the vacuumadiabatic body. In this case, the effect of preventing deterioration ofthe adiabatic performance of the vacuum adiabatic body can be obtained.

The defrost water can pass through a drain pipe (also referred to as DP)connecting the evaporators 81 and 82 and the defrost water connectionpart 510 or the drain tray (DT2) 500. The drain pipes (DP1 and DP2) maypass through the welding pipeline and the corrugated conductiveresistance sheet 63.

According to the present embodiment, a larger action effect can beexpected in a case where the space inside the mullion 300 is narrow.

Referring to FIG. 21, the present embodiment characteristically differsfrom the embodiment of FIG. 19 in that one evaporator is installed inthe second main body 2 a.

This will be described in detail below.

In this embodiment, although the controller 450 is placed inside themullion 300, a drain tray (abbreviated as DT) 500 and a drain heater(also abbreviated as DH) 501 is not placed inside the mullion 300.

In this embodiment, the supply path of the power supply is the same asthat illustrated in FIG. 19.

In the present embodiment, the evaporator is provided with a singleevaporator 83 which is provided as a single unit without being providedfor each of the bodies 2 a and 2 b. Accordingly, the refrigerant can besupplied to the single evaporator 83 in a state before evaporation bythe member including the compressor P placed in the machine chamber 8.So as to improve the efficiency of the refrigeration cycle, it ispreferable for pipelines of the inlet and outlet of the singleevaporator 83 to perform heat exchange with each other. Therefore, theheat exchange curved pipes are provided inside the wall body of thevacuum insulation body so that heat exchange can be performed with eachother.

The cold air is explained. Cool air is provided by a single evaporator83 placed inside the second main body 2 b, and the cold air can besupplied to the inside of the second main body 2 b. The cold air in thesecond main body 2 b may be supplied to the inside of the first mainbody 2 a through the cold air flow path 89 provided in the mullion 300.A fan for blowing cold air from the second main body 2 b to the firstmain body 2 a may be provided in the cold air flow path 89. The cold airflow path 89 can include a flow path which guides relatively cool-coldair from the second main body 2 b to the first main body 2 a and a flowpath which guides relatively hot-cold air from the first main body 2 ato the second main body 2 b.

The discharging path of the defrost water will be described.

The defrost water generated in the single evaporator 83 is collected inthe drain tray (DT2) 500 positioned inside the machine chamber 8 and canbe appropriately vaporized and removed by the drain heater (DH2) 502.Here, the defrost water can pass through a drain pipe (also referred toas DP) connecting the single evaporator 83 and the drain trays (DT1)(DT2) 500 to each other. The drain pipes (DP1) (DP2) may pass throughthe welding pipeline and the corrugated conductive resistance sheet 63.

This embodiment is more preferably applied in a case of a refrigeratorin which the inner space of the first main body is narrow, the innerspace of the mullion is narrow, the size of the refrigerator is small,the large cooling capacity is not required, or the lower-freezingrefrigerator.

Referring to FIG. 22, the present embodiment characteristically differsfrom the embodiment illustrated in FIG. 21 in that the single evaporator83 is installed inside the first main body 2 a. The defrost waterdischarge path is similar to the embodiment illustrated in FIG. 20.

This will be described in detail below.

In the present embodiment, the controller 450 and the defrost waterconnection part 510 are placed inside the mullion 300.

In this embodiment, the supply path of the power supply in thisembodiment is the same as that illustrated in FIG. 19.

In the present embodiment, the evaporator is provided with a singleevaporator 83 which is provided as a single unit without being providedfor each of the main bodies 2 a and 2 b. Therefore, the refrigerant canbe provided to the single evaporator 83 in a state before evaporation bythe member including the compressor P placed in the machine chamber 8.So as to improve the efficiency of the refrigeration cycle, it ispreferable that heat transfer between the pipelines of the inlet andoutlet of the single evaporator 83 is performed. Therefore, the heatexchange curved pipes are provided inside the wall body of the vacuumadiabatic body so that heat exchange can be performed with each other.However, the single evaporator 83 is placed in the first main body 2 ainstead of the second main body 2 b.

The cold air will be described. Cold air is provided by a singleevaporator 83 placed inside the first main body 2 a, and the cold aircan be supplied to the inside of the first main body 2 a. The cold airinside the first main body 2 a can be supplied to the inside of thesecond main body 2 b through the cold air flow path 89 provided to themullion 300. A fan for blowing cold air from the first main body 2 a tothe second main body 2 b may be provided in the cold air flow path 89.The cold air flow path 89 can include a flow path for guiding relativelycool-cold air from the first main body 2 a to the second main body 2 band a flow path for guiding relatively hot-cold air from the second mainbody 2 b to the first main body 2 a.

The discharging path of the defrost water will be described.

The defrost water generated in the single evaporator 83 may be guided tothe defrost water connection part 510 positioned inside the mullion 300.The defrost water connection part 510 is a portion where defrost watergenerated in the single evaporator 83 is guided primarily to the outsideof the first main body 81. The defrost water connection part 510 may beprovided as a drain tray (DT1) or a connection pipe (CP).

The defrost water of the defrost water connection part 510 is collectedin the drain tray (DT2) 500 positioned inside the machine chamber 8 andcan be appropriately vaporized and removed by the drain heater (DH) 501.At this time, the pipeline connecting between the defrost waterconnection part 510 and the drain tray (DT2) to each other may be guidedto the outside without passing through the wall body of the vacuuminsulation body. In this case, the effect of preventing deterioration ofthe adiabatic performance of the vacuum adiabatic body can be obtained.

The defrost water can pass through a drain pipe (also referred to as DP)connecting the single evaporator 83 and the defrost water connectionpart 510. The drain pipe (DP1) may pass through the welding pipeline andthe corrugated conductive resistance sheet 63.

The present embodiment may be more preferably applied in a case of arefrigerator in which the inner space of the second main body is narrow,the size of the refrigerator is small, a large cooling capacity is notrequired, or the upper-refrigerating refrigerator.

Referring to FIG. 23, this embodiment differs from the embodimentillustrated in FIG. 22 in that a structure for collecting and vaporizingthe defrost water is provided to the mullion.

This will be described in detail below.

The supply path of the power supply, the supply path of the refrigerant,and the supply path of the cold air are the same as those of theembodiment of FIG. 22, and the discharge path of the defrost water ischaracteristically different from the embodiment of FIG. 22.

The defrost water generated in the single evaporator 83 is collected inthe drain tray (DT1) 500 positioned inside the mullion 300 and can beappropriately evaporated and removed by the drain heater (DH1) 501.

In this embodiment, in a case where the inner space of the second mainbody is narrow, the size of the refrigerator is small, the large coolingcapacity is not required, or the upper-refrigerating refrigerator, in acase where the space of the machine chamber 8 is narrow, and apredetermined level or more of space can be secured in the mullion 300,it can be more preferably applied.

INDUSTRIAL APPLICABILITY

The present invention proposes a method for supporting a gap part in therefrigerator which is physically separated from each other in a casewhere a separate vacuum adiabatic body is used and a method foreffectively utilizing the mullion using a feature in which an adiabaticaction is not required in the gap part therebetween.

According to the present invention, there is proposed a method foractively controlling the environment in a refrigerator as needed using avacuum adiabatic body in a refrigerator in which refrigerating andfreezing are required together.

This suggests that the vacuum adiabatic body can be used moreindustrially.

1. A vacuum adiabatic body comprising: a first plate that defines atleast a portion of a first side of a wall adjacent to a first spacehaving a first temperature; a second plate that defines at least aportion of a second side of the wall adjacent to a second space having asecond temperature; a seal that seals the first plate and the secondplate to provide a third space that has a third temperature and is in avacuum state; at least one support in the third space; a conductiveresistance sheet that connects the first plate to the second plate andis configured to resist a heat transfer between the first plate and thesecond plate; and a support block that is fastened to an outer surfaceof the second plate, the support block having a recess configured toreceive a controller.
 2. The vacuum adiabatic body according to claim 1,wherein the support block is provided on a flat surface at a vertex ofthe second plate.
 3. The vacuum adiabatic body according to claim 2,further comprising: a division panel that is fastened across a flatsurface of the second plate.
 4. A refrigerator comprising: at least twovacuum adiabatic bodies, each adiabatic body defining a storage space,and each adiabatic body having a first plate that defines at least aportion of a first side of a wall adjacent to a first space, a secondplate that defines at least a portion of a second side of the walladjacent to a second space having a second temperature, a seal thatseals the first plate to the second plate to provide a third space thathas a third temperature and is in a vacuum state, at least one supportin the third space, a thermal insulator that reduces heat transferbetween the first plate and the second plate, and an opening that formswith respect to a storage space; a non-adiabatic body that attaches toan outer surface of a first one of the at least two vacuum adiabaticbodies, and connects the at least two vacuum adiabatic bodies; anevaporator provided in an inner part of the storage space; a machinechamber provided outside the storage space; a refrigerant pipe thatconnects the machine chamber and the evaporator; and a drain pipe thatpenetrates the vacuum adiabatic body to guide defrost water generatingat the evaporator to outside of the vacuum adiabatic body, wherein aheat transfer rate of a space defined by the non-adiabatic body ishigher than a heat transfer rate in the third space, wherein at leastone of the defrost water and an electric line path penetrates the thirdspace, and through-holes for pipelines are provided on the first plateand the second plate, and wherein the non-adiabatic body includes aplurality of support blocks that maintain a gap between the at least twovacuum adiabatic bodies, and at least one plate coupling the pluralityof support blocks to form the space.
 5. The refrigerator according toclaim 4, wherein the at least one plate includes a hinge fastener towhich a door hinge is attached to support rotation of a door, andwherein each of the vacuum adiabatic bodies include a separate door. 6.The refrigerator according to claim 4, wherein a controller is providedin an inner space of the non-adiabatic body, and supplies power to anelectric component for operation of the refrigerator.
 7. Therefrigerator according to claim 6, wherein a path for discharging thedefrost water from the evaporator in the storage space is positioned inthe inner space of the mullion non-adiabatic body.
 8. The refrigeratoraccording to claim 7, wherein the non-adiabatic body includes a divisionpanel that separates into a first space in which the path fordischarging the defrost water is provided and a second space at whichthe controller is provided.
 9. The refrigerator according to claim 4,further comprising: a division panel that divides an inner space of thenon-adiabatic body into at least two spaces.
 10. The refrigeratoraccording to claim 9, wherein a defrost water tray is provided at one ofthe at least two spaces.
 11. A refrigerator comprising: a first mainbody having a first cavity provided by a first plate and a second plate;a second main body having a second cavity provided by a third plate anda fourth plate; a first seal that seals the first plate to the secondplate and a second seal that seals the third plate to the fourth plateso that the first plate and the third plate define at least a portion ofa first side of a wall adjacent to a first space, the second plate andthe fourth plate define at least a portion of a second side of the walladjacent to a second space having a second temperature, and a thirdspace is provided to have a third temperature, and is a vacuum state; atleast one support in the third space; a first thermal insulator thatreduces a heat transfer amount between the first plate and the secondplate; a second thermal insulator that reduces a heat transfer amountbetween the third plate and the fourth plate; a door to close at least aportion of an opening of at least the first main body; a gasketinstalled to at least one of the door and the first main body so as toseal a portion in which the door is to control the first main body; anda support block that is positioned between the first main body and thesecond main body, and is fastened to an outer surface of the secondplate, the support block having a recess to receive a controller. 12.The refrigerator according to claim 11, wherein a gap is providedbetween the second plate and the fourth plate based on the supportblock, and a through-hole is provided for communicating between thefirst main body and the second main body.
 13. The refrigerator accordingto claim 11, wherein a gap is provided between the second plate and thefourth plate based on the support block, and a discharge flow path ofdefrost water generated in the third space is provided.
 14. Therefrigerator according to claim 11, wherein a gap is provided betweenthe second plate and the fourth plate based on the support block, and acold air flow path is provided to communicate between the first mainbody and the second main body.
 15. The refrigerator according to claim11, wherein a gap is provided between the second plate and the fourthplate based on the support block, and a refrigerant flow path isprovided to communicate between the first main body and the second mainbody.
 16. The refrigerator according to claim 11, wherein a gap isprovided between the second plate and the fourth plate based on thesupport block, and an electric line path is provided to communicatebetween the first main body and the second main body.
 17. Therefrigerator according to claim 11, wherein the controller is positionedat a gap formed based the support block between the second plate and thefourth plate.
 18. The refrigerator according to claim 11, wherein atleast two support blocks are provided and at least one surface of one ofthe at least two support blocks is opened.
 19. The refrigeratoraccording to claim 11, further comprising: a door hinge fastened to thesupport block, and connects the door to the first main body.
 20. Therefrigerator according to claim 11, wherein the first main body and thesecond main body are vertically stacked.